The Removal of Pertechnetate from Aqueous Solution by Synthetic Hydroxyapatite: The Role of Reduction Reagents and Organic Ligands.

The use of knowledge from technetium radiochemistry (even from nuclear medicine applications) allows us to select an sorbent for Tc radionuclide sorption, which is hydroxyapatite. Using radioisotope indication, the TcO₄ sorption process on synthetic hydroxyapatite was studied by the batch method in the presence of SnCl and FeSO reducing agents. The complexing organic ligands' effect on the TcO₄ sorption under reducing conditions was investigated.

Isotherm, Kinetic, and Selectivity Studies for the Removal of Ba and Cs from Aqueous Solution Using Turkish Perlite.

The efficiency of 133Ba and 137Cs removal from aqueous solution is vital to mitigate ecological concerns over spreading these radionuclides in the environment. The present work focused on the use of Turkish perlite for the sorptive removal of 133Ba and 137Cs from aqueous solution by the radioindicator method. Perlite was characterized by XRF, XRD, FTIR, SEM−EDX, and BET analyses.

Separation techniques for quantification of radionuclides in environmental samples.

The reliable and quantitative measurement of radionuclides is important in order to determine environmental quality and radiation safety, and to monitor regulatory compliance. We examined soil samples from Podunajske Biskupice, near the city of Bratislava in the Slovak Republic, for the presence of several natural ((238)U, (232)Th, (40)K) and anthropogenic ((137)Cs, (90)Sr, (239)Pu, (240)Pu, (241)Am) radionuclides. The area is adjacent to a refinery and hazardous waste processing center, as well as the municipal incinerator plant, and so might possess an unusually high level of ecotoxic metals.